package com.bdqn.springCloud.controller;

import com.bdqn.springCloud.entity.CommonResult;
import com.bdqn.springCloud.entity.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
    //    private static final String PAYMENT_URL = "http://localhost:8001";
    //负载均衡
    private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate template;

    //自己写的轮循负载均衡
//    @Resource
//    private LoadBalancer loadBalancer;
    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult create(Payment payment) {
        return template.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult getPayment(@PathVariable("id") Long id) {
        return template.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> forEntity = template.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (forEntity.getStatusCode().is2xxSuccessful()) {
            return forEntity.getBody();
        } else {
            return new CommonResult(444, "操作失败");
        }
    }

//    @GetMapping("/consumer/payment/lb")
//    public String getPaymentLB() {
//        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
//        if (instances == null || instances.size() <= 0) {
//            return null;
//        }
//        ServiceInstance serviceInstance = loadBalancer.instance(instances);
//        URI uri = serviceInstance.getUri();
//            return template.getForObject(uri + "/payment/lb", String.class);
//    }
}

